anyone having scope problems????

[SEAN3513 7]

just found this article i posted on another forum years ago, so thought i would share it on here, it may be of some use to someone, posted in the airgun section aswell.

 

to ensure optimum performence from your scope it is best to keep the erector tube (which carries the reticule) as near to the centre of the scope body as possible.

 

Mechanically centering a scope

 

most scopes are centred when they leave the factory but if you are unsure whether yours is ( if its seccond hand), here is what to do.

count the number of clicks from one extreme of the turrets travel to the other and settle for the middle ground, so , if the maximum number of revolutions is 10 set it at 5, which will allow for equal adjustment in both directions. Your scope is now mechanically centered but ideally it should also be optically centred.

 

Optically centering a scope

 

find a sturdy carboard box that measures approx 10" x 5" and approx 4" deep or more ( childs shoe box). if its an ordinary cardboard box remove the flaps to the top edge of the box is flat. Cut 2 "V" shaped notches in the top edges of the sides of the box( make sure they are the same size)so your scope can be rested across the box.

put somthing heavy in the bottom of the box to stabalise it and place your scope across the top in the "v's" with the turret covers removed. Put the box on a window sill or table so you can see through the scope. View the picture through the scope whilst you rotate it thrugh 360 degrees and see if the reticule stays in the same position or if it appears to move off centre, if it does appear to move, adjust the turrets until the reticule stays in the same position as you rotate it round. Dont worry about what the reticule is lined up with as long as its centre is constantly covering the same point. The scope is now optically centred.

 

the reason for this is, it makes zeroing a scope much easier as any over adjustment of one turret will lead to a restriction of the amount of adjustment in the other which can result in difficulty when zeroing.

 

 

all the best

 

sean